01.Raw material preparation:
Prepare the raw materials for hot-rolled seamless steel pipes, including billets and alloy elements.
02.Heating:
Heat the billets to an appropriate temperature, usually above 1150°C.
03.Piercing:
Place the heated billets into a piercing machine to create a rough pipe.
04.Rolling:
Feed the rough pipe into a rolling mill and perform multiple passes to achieve the desired diameter and wall thickness.
05.Cooling:
Cool the rolled pipes gradually to reduce their temperature.
06.Sizing:
Process the cooled pipes to achieve precise diameter according to the specified dimensions.
07.Heat treatment:
Subject the sized pipes to heat treatment to improve their mechanical properties and microstructure.
08.Straightening:
Straighten the pipes that have undergone heat treatment to achieve a straight shape.
09.Inspection:
Perform various inspections on the straightened pipes, including visual inspection, physical property testing, and chemical composition analysis.
10. Marking and packaging:
Mark the qualified pipes and package them for transportation and storage.
